"Both parents are so excited, and were happily joking around with the photographers," an onlooker at the premiere told Us Weekly. "She was holding her belly and he was pointing at her, joking, 'I did this!'"

Christensen, who played Julia Braverman-Graham on the beloved NBC series that ended in January 2015 after six seasons, shared a sweet pic on Instagram earlier this month of her Parenthood niece Mae Whitman touching her belly. "Hello, Baby," she captioned the June 4 pic taken at her baby shower. "Mae meets the bump."